CN111483678A

CN111483678A - Connecting piece and tray

Info

Publication number: CN111483678A
Application number: CN202010367353.0A
Authority: CN
Inventors: 不公告发明人
Original assignee: Shanghai Hongyan Returnable Transit Packagings Co Ltd
Current assignee: Shanghai Hongyan Returnable Transit Packagings Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-08-04

Abstract

The invention provides a tray, which comprises a base and rollers arranged below the base, wherein the base is in a rectangular plate shape, a base accommodating part is arranged near the edge of the base, the base accommodating part is provided with a clamping cavity and an accommodating cavity, the clamping cavity and the accommodating cavity are arranged near the edge and are spaced from each other, and the clamping cavity is closer to the edge of the base relative to the accommodating cavity. The connecting piece and the tray can be conveniently connected and disconnected, and the connecting piece can be repeatedly used, so that the waste generated by the repeated use of the connecting piece in the prior art is avoided, and the field environmental pollution is avoided.

Description

Connecting piece and tray

Technical Field

The present invention relates to pallets, and more particularly to connectors for pallets and pallets that can be connected to each other.

Background

The unit size of the existing tray is generally 800 × 600mm when a single tray is used as a unit in a unitized mode, in order to reduce the times of round-trip transportation in a field, the unitized trays are often connected with each other and then are transported in a circulating mode in a traction mode, the connecting mode of the existing tray unit generally adopts a connecting mechanism or expendable articles such as a disposable ribbon and the like, the connecting mechanism generally has a plurality of parts, the matching requirement is high, the parts are easy to damage, the band is exposed out of the product when the tray is used or not used and is not beneficial to product recovery, then the disposable ribbon is used, when the disposable ribbon is recovered, the parallel connection is required to be disassembled, the ribbon needs to be cut, the cut ribbon is scattered in the field and is not beneficial to field environment maintenance, even the ribbon scattered in the field is wound into a wheel support along with the transportation of the tray, so that potential hazards are caused to the field environment and transportation safety, in addition, the disposable ribbon is used for a long time, and the use cost of the tray.

Accordingly, there is a need in the art for a connector that can conveniently interconnect trays and that can be reused and a tray that can conveniently be connected to each other.

Disclosure of Invention

Based on the existing defects, the invention provides the tray, the tray can be clamped and hinged with the connecting piece, so that the adjacent trays are connected side by side, a plurality of trays are simultaneously pulled to carry, after the goods are emptied, the locking can be immediately realized by one key, and the connecting piece is hidden in the base accommodating part, so that the tray is convenient to recycle.

The invention provides a tray which comprises a base and rollers arranged below the base, wherein the base is in a rectangular plate shape, a base accommodating part is arranged near the edge of the base, the base accommodating part is provided with a clamping cavity and an accommodating cavity, the clamping cavity and the accommodating cavity are arranged close to the edge and are spaced from each other, and the clamping cavity is closer to the edge of the base relative to the accommodating cavity.

In one embodiment, the clamping cavity has an upward opening, and the size of the clamping cavity in the direction perpendicular to the edge is smaller than that of the clamping cavity in the direction.

In one embodiment, the base receiving portion is provided adjacent at least one pair of opposing edges of the base.

In one embodiment, the base receiving portion is located on a top surface of the base or a side surface of the rim adjacent to the rim.

In an embodiment, the connector further comprises a connecting strip, a first clamping portion and a second clamping portion are respectively arranged at two ends of the connecting strip, at least one part of the connecting strip between the first clamping portion and the second clamping portion is flexible along the extending direction of the connecting strip, and the clamping cavity is arranged to be capable of being mutually clamped with the first clamping portion, pivotally connected with the first clamping portion by taking the first clamping portion as a pivot, and capable of being mutually clamped with the second clamping portion.

In an embodiment, the first engaging portion and the second engaging portion are respectively provided with protruding shafts at two ends perpendicular to the extending direction of the connecting strip.

In one embodiment, the two protruding shafts of the second engaging portion are respectively provided with an elastic device that biases the two protruding shafts toward the outside of the connecting bar.

In one embodiment, at least one of the two protruding shafts is arranged on an elastic sheet extending perpendicular to the connecting strip and parallel to the direction of extension of the connecting strip.

In one embodiment, the two protruding shafts are respectively disposed on two elastic pieces extending perpendicular to the connecting strip and parallel to the extending direction of the connecting strip, and the two elastic pieces are respectively located on two sides of the connecting strip.

In one embodiment, the elastic sheet is provided on an outer side thereof with a connecting member operating portion which is a flange spaced apart from the protruding shaft and closer to a center of the connecting bar with respect to the protruding shaft.

In an embodiment, the two protruding shafts of the first engaging portion are two ends of a rod-shaped member extending from the end of the connecting bar perpendicularly to the extending direction of the connecting bar.

In one embodiment, the two elastic pieces are connected to each other at the ends of the connecting strip by ribs perpendicular to the connecting strip.

The invention provides a connecting piece, which comprises a connecting strip, wherein a first clamping part and a second clamping part are respectively arranged at two ends of the connecting strip, and at least one part of the connecting strip between the first clamping part and the second clamping part is flexible along the extension direction of the connecting strip.

Drawings

Fig. 1 is a perspective view of a tray according to the present invention.

Fig. 2 is a perspective view of two pallets according to the present invention connected to each other by a connecting member of the present invention, in which the connecting portion is partially cut away.

Fig. 3-5 are enlarged views of the cut-away portion of fig. 2, with the connector in a connected state, an open state, and a stowed state, respectively.

Fig. 6 is a perspective view of a connector according to the invention, shown in broken lines in a connected or stowed position respectively.

Fig. 7 is a perspective view of trays according to another embodiment of the present invention connected to each other by the connecting member of the present invention, wherein the connecting portion is partially cut away.

Fig. 8-10 are enlarged views of the cut-away portion of fig. 7 with the connectors in a connected state, an open state, and a stowed state, respectively.

Fig. 11 is a perspective view of a tray according to another embodiment of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

Referring to fig. 1, a perspective view of a tray 100 according to the present invention is shown. The tray 100 includes a base 110 and a roller 120 disposed under the base, wherein the base 110 has a substantially rectangular plate shape having a certain thickness. Due to the arrangement of the rollers 120, the pallet 100 may travel over the ground. The chassis 100 has a pair of long edges 111 and a pair of short edges 112. A base receiving portion 130 is provided on an upper surface of the base 110. Wherein the base receiving part 130 is disposed near a pair of long edges 111 of the base 110, and a pair of base receiving parts 130 spaced apart from each other are disposed near each of the long edges 111. It should be understood that the base receivers 130 may be disposed adjacent to the pair of short edges 112. The base receiving portion 130 near each edge may be one near the center or two or more spaced apart from each other. In the illustrated embodiment, the base receiving portion 130 is located on an upper surface of the base 110. In yet another embodiment shown in fig. 7-10, the base receiving portion 130 may also be disposed on the side of the long edge 111 of the base 110. The tray 100 is also shown with recessed pockets at the four corners to facilitate stacking and storage of the tray 100. The structure and principle of the present invention will be described below based on the embodiments shown in the drawings.

Fig. 2 shows that the two trays 100 are connected to one another by a connecting element 200 which snaps into the base receptacle 130, wherein the long edges 111 of the two trays 100 are connected to one another. The base receiving portions 130 adjacent to two trays 100 are partially cut away in the drawing.

Fig. 3 to 5 are enlarged views of the cut-away portion of fig. 2, in which the link 200 is in a connected state, an opened state, and a stored state, respectively.

As shown in fig. 3, the base accommodating portion 130 near the long edge 111 of the base 110 is provided with a snap cavity 131 and an accommodating cavity 132. The engaging cavity 131 and the accommodating cavity 132 are disposed near the edge 111 and spaced apart from each other, and the engaging cavity 131 is closer to the edge 111 of the base 110 than to the accommodating cavity 132. In the particular embodiment shown, the snap cavity 131 and the receiving cavity 132 are spaced apart in a direction perpendicular to the edge 111, but it should be understood that the snap cavity 131 and the receiving cavity 132 may also be spaced apart in a direction that is oblique relative to the edge 111. Preferably, the base receiving part 130 is a cavity recessed downward from the upper surface of the base 110 by a certain depth, so as to ensure that the connecting member 200 does not protrude from the upper surface of the base 110 in either the connected state or the received state. A catching cavity 131 and an accommodating cavity 132 are provided on the recessed bottom surface 134 of the base accommodating part 130.

As shown in fig. 6, the connector 200 includes a connecting bar 210, and both ends of the connecting bar 210 are respectively provided with a first engaging portion 220 and a second engaging portion 230, wherein at least a portion of the connecting bar 210 between the first engaging portion 220 and the second engaging portion 230 is flexible or pliable along an extending direction of the connecting bar 210. In the illustrated embodiment, the entire connecting strip 210 is made of a flexible material. The first engaging portion 220 and the second engaging portion 230 are provided to be respectively engageable with the engaging cavities 131 of the adjacent base accommodating portions 130 on the bases 110 of two trays 100 adjacently placed side by side, thereby connecting the two trays 100 to each other. The length of the connecting bar 210 is approximately twice the distance from the clamping cavity 131 to the edge of the base. Therefore, when the first engaging portion 220 and the second engaging portion 230 are respectively engaged with the engaging cavities 131 of two adjacent trays 100, the connecting strip 210 can be tightly attached to the base 110, and the placement of the goods on the base 110 is not affected.

In the embodiment shown in fig. 3-5, the snap-fit cavity 131 has an upward opening at the surface of the recessed bottom surface 134, the dimension of which in a direction perpendicular to said edge 111 is smaller than the dimension of the snap-fit cavity 131 in this direction. And the first engaging portion 220 and the second engaging portion 230 of the connecting member 200 are respectively provided with protruding

shafts

221 and 231 at both ends in a direction perpendicular to the connecting bar 210. When the first engaging portion 220 or the second engaging portion 230 is engaged in the engaging cavity 131, the protruding

axes

221 and 231 are parallel to the edge 111 and are located in the engaging cavity 131, and the dimension of the opening of the engaging cavity 131 in the direction perpendicular to the edge 111 is smaller than the dimension of the engaging cavity 131 in the direction, so that the first engaging portion 220 or the second engaging portion 230 can be prevented from being disengaged from the engaging cavity 131 due to the pulling force applied thereto by the connecting strip 210.

In the embodiment shown in fig. 3-5, a base stop 1311 is provided at the opening of the clamping cavity 131, and the base stop 1311 is an overhanging plate extending inward from the edge of the opening of the clamping cavity 131 in a direction parallel to the edge 111. It should be understood that the snap-fit cavity 131 may be otherwise provided as long as the dimension of the opening in a direction perpendicular to the edge 111 is smaller than the dimension of the snap-fit cavity 131 in that direction.

As shown in fig. 6, the first engaging portion 220 is a rod-shaped member extending from one end of the connecting bar 210 perpendicularly to the extending direction of the connecting bar 210, and the protruding shaft 221 is two ends of the rod-shaped member. Thereby, the first engaging portion 220 can rotate therein after being engaged into the engaging cavity 131, so that the pivotal connection between the connector 200 and the engaging cavity 131 is formed. In the illustrated embodiment, the rod-shaped member is a cylinder, but it should be understood that the first engaging portion 220 need not be a cylinder, such as other centrally symmetrical or asymmetrically shaped rods, so long as a portion thereof is capable of rotating about the central axis within the engaging cavity 131.

As shown in fig. 6, the two protruding shafts 231 of the second engaging portion 230 are respectively provided on two elastic pieces 232 extending perpendicularly to the connecting bar 210, and the two elastic pieces 232 are respectively located on both sides of the connecting bar 210. Wherein the dimension of the elastic piece 232 in the direction perpendicular to the connecting bar 210 is not greater than the dimension of the protruding shaft 231 in that direction. The two elastic pieces 232 are respectively provided on outer sides thereof with link operation parts 233, and the link operation parts 233 are flanges extending outward from both sides of the elastic pieces 232, the flanges being spaced apart from the protruding shafts 231 and closer to the center of the connecting bar 210 with respect to the protruding shafts 231, that is, farther from the end of the connecting bar 210 where the second engaging parts 230 are provided. After the first engaging portion 220 and the second engaging portion 230 are respectively engaged into the engaging cavities 131 of two adjacent trays 100, the connection between the trays 100 is realized. When it is necessary to release the connection, an operator can press the two connector operating portions 233 toward each other from the outside at the same time, so as to bring the two protruding shafts 231 toward each other, whereby the distance between the two distal ends of the two protruding shafts 231 is shortened, and the second engaging portion 230 can be pulled out from the engaging cavity 131. Preferably, the two elastic pieces 232 are connected to each other at the ends of the connecting bar 210 by ribs 234 perpendicular to the connecting bar 210, thereby further enhancing the rigidity between the two elastic pieces 232 perpendicular to the extending direction of the connecting bar 210.

However, it should be understood that the two protruding shafts 231 may be disposed on other elastic means, for example, protruding shaft mounting holes with openings facing to both sides may be disposed on the connecting strip 210, the two protruding shafts 231 are respectively disposed in the protruding shaft mounting holes, a spring is disposed between the bottom of the protruding shafts 231 and the bottom of the protruding shaft mounting holes, a flange is disposed on the outer circumference of the bottom of the protruding shafts 231, and the openings of the protruding shaft mounting holes are provided with corresponding stopping shoulders to prevent the protruding shafts 231 from being removed from the protruding shaft mounting holes. And corresponding connector operating parts may be provided on the side surfaces of the protruding shafts 231 to facilitate an operator to press the protruding shafts 231 toward each other against the elastic force of the springs, thereby enabling the second catching part 230 to be taken out of the catching cavity 131.

Further, it is also understood that it may be possible to provide only one of the two protruding shafts 231 on the elastic means as long as the two protruding shafts 231 can be relatively close to each other against the elastic force.

In the above-described embodiment, the protrusion axes 221 and 231 extend perpendicular to the extending direction of the connection bar 210, but it should be understood that the protrusion axes 221 and 231 may also extend at an angle with respect to the extending direction of the connection bar 210 as needed, for example, in the case where the above-mentioned catching cavity 131 and receiving cavity 132 are spaced apart in a direction inclined with respect to the edge 111, as long as the protrusion axes 221 and 231 are parallel to each other.

The shapes of the engaging cavity 131 and the accommodating cavity 132 are set to substantially match the shape of the second engaging portion 230. That is, the depth of the engaging cavity 131 and the accommodating cavity 132 is not less than the length of the elastic piece 232 of the second engaging portion 230. Furthermore, the dimension of the opening of the engaging cavity 131 perpendicular to the direction of the rim 111 is substantially the same as the radial dimension of the protruding

shafts

231 and 221 or slightly smaller than the radial dimension of the protruding

shafts

231 and 221. So that the first clamping portion 220 or the second clamping portion 230 and the clamping cavity 131 form an interference fit or a transition fit. Thus, the first engaging portion 220 and the second engaging portion 230 cannot be easily disengaged from the engaging cavity 131. And the dimension of the receiving cavity 132 in the direction perpendicular to the rim 111 is larger than the radial dimension of the protruding shaft 231 so that the second engaging portion 230 is easily received in the receiving cavity 132.

Another embodiment according to the present invention is shown in fig. 7-10. This embodiment is substantially the same as the previous embodiments, except that the base receiving portion 130' is provided on the side of the base 110 adjacent to the corner of the tray. Specifically, the bottom receiving portion 130' is located on the side of the long edge 111 adjacent to the tray corner. It should be understood that the bottom receptacle 130' may also be disposed on the side of the short edge 112 adjacent a tray corner.

In fig. 7, it is shown that the two trays 100 are coupled to each other by the coupling member 200 snapped into the seating accommodation portion 130', and in this embodiment, the two short edges 112 of the two trays 100 are coupled to each other when the two trays 100 are in the coupled state. The base receiving portions 130' adjacent to the two trays 100 are partially cut away in the drawing.

Fig. 8 to 10 are enlarged views of the cut-away portion of fig. 7, in which the link 200 is in the connected state, the opened state, and the stored state, respectively.

As shown in fig. 8, the base receiving portion 130 ' of the side of the short edge 112 of the base 110 at a position near the corner of the tray is provided with a catching cavity 131 ' and a receiving cavity 132 '. The snap cavity 131 'and the receiving cavity 132' are disposed adjacent to the edge 111 and spaced apart from each other, and the snap cavity 131 'is closer to a corner of the base 110 relative to the receiving cavity 132'. In the particular embodiment shown, the snap-fit cavity 131 'and the receiving cavity 132' are spaced from each other along the direction of extension of the short edge 112, but it is understood that the snap-fit cavity 131 'and the receiving cavity 132' may be spaced in a direction that is angled from the short edge 112 as desired.

Preferably, the base receiving portion 130' is a recessed cavity recessed to a certain depth from the side of the short edge 112, thereby ensuring that the connecting member 200 does not protrude from the side of the short edge 112 in either the connected state or the received state. A catching cavity 131 'and a receiving cavity 132' are formed on a recessed bottom surface 134 'of the base receiving portion 130'.

The coupling member 200 in this embodiment is identical in structure to the coupling member 200 in the above-described embodiment in that the first engaging portion 220 and the second engaging portion 230 are respectively engageable with the engaging cavities 131 'of the adjacent base receiving portions 130' on the bases 110 of two trays 100 adjacently placed side by side, thereby coupling the two trays 100 to each other. The length of the connecting strip 210 is approximately twice the distance from the clamping cavity 131' to the base edge 111. Therefore, when the first engaging portion 220 and the second engaging portion 230 are engaged with the engaging cavities 131' of two adjacent trays 100, respectively, the connecting bar 210 can be tightly attached to the base 110, and will not protrude from the side of the short edge 112 to accidentally interfere with the surrounding objects, for example, be caught by the surrounding objects.

In the embodiment shown in fig. 8-10, the snap-fit cavity 131 ' has an opening in the surface of the recessed bottom 134 ', which opening has a smaller dimension in a direction parallel to the short edge 112 than the snap-fit cavity 131 ' in that direction. When the first engaging portion 220 or the second engaging portion 230 is engaged with the engaging cavity 131 ', the protruding

shafts

221 and 231 are located in the engaging cavity 131 ' along the vertical direction, and the dimension of the opening of the engaging cavity 131 ' along the direction parallel to the short edge 112 is smaller than the dimension of the engaging cavity 131 ' along the direction, so that the first engaging portion 220 or the second engaging portion 230 can be prevented from being disengaged from the engaging cavity 131 ' due to the pulling force applied thereto by the connecting bar 210.

In the embodiment shown in fig. 8-10, a base stop 1311 'is provided at the opening of the clamping cavity 131', and the base stop 1311 'is a cantilevered plate extending inwardly from the edge of the opening of the clamping cavity 131' in a direction parallel to the short edge 112. It should be understood, however, that the snap-fit cavity 131 'can also be provided in other ways, as long as the dimension of the opening in a direction parallel to the short edge 112 is smaller than the dimension of the snap-fit cavity 131' in this direction.

The first engaging portion 220 can rotate therein after being caught in the engaging cavity 131 ', so that the pivotal connection between the link 200 and the engaging cavity 131' is formed. After the first engaging portion 220 and the second engaging portion 230 are respectively engaged into the engaging cavities 131' of two adjacent trays 100, the connection between the trays 100 is achieved. When it is necessary to release the connection, the operator can press the two connector operating portions 233 toward each other from the outside at the same time, thereby bringing the two protruding shafts 231 closer to each other, whereby the distance between the two distal ends of the two protruding shafts 231 is shortened, and the second engaging portion 230 can be pulled out from the engaging cavity 131'.

The shapes of the catching cavity 131 'and the receiving cavity 132' are set to substantially match the shape of the second catching portion 230. That is, the depth of the engaging cavity 131 'and the accommodating cavity 132' is not less than the length of the elastic piece 232 of the second engaging portion 230. Further, the dimension of the opening of the engaging cavity 131' in the direction perpendicular to the long edge 111 is substantially the same as or slightly smaller than the radial dimension of the protruding

shafts

231 and 221. So that the first engaging portion 220 or the second engaging portion 230 and the engaging cavity 131' form an interference fit or a transition fit. Thus, the first engaging portion 220 and the second engaging portion 230 cannot be easily disengaged from the engaging cavity 131'. And the dimension of the receiving cavity 132 'in parallel with the short edge 112 is larger than the radial dimension of the protruding shaft 231, so that the second engaging portion 230 is easily received in the receiving cavity 132'.

The connector 200 and the tray 100 according to the present invention are used as follows:

when it is required to connect two trays 100 to each other, the first catching portion 220 of the connector 200 is first snap-fitted into the catching cavity 131/131 ' of the base accommodating portion 130/130 ' of one tray base 110, and then the second catching portion 230 of the connector 200 is snap-fitted into the corresponding catching cavity 131/131 ' of another adjacent tray base 110. When the connection between two trays 100 needs to be released, the second engaging portion 230 is taken out from the engaging cavity 131/131 ' of another adjacent tray base 110 by pressing the two link operating portions 233 first, and then the link 200 is rotated with the first engaging portion 220 as a rotation shaft until the second engaging portion 230 can be inserted into the receiving cavity 132/132 ' of the base receiving portion 130/130 ' of the tray base 110. At this time, the two trays 100 are separated from each other, and the link 200 is placed in the base receiving portion 130 of the tray base 110 without protruding from the surface where the base receiving portion 130/130' is located.

According to the connecting member 200 and the tray 100 of the present invention, the connection and disconnection between the trays 100 can be conveniently performed, and the connecting member 200 can be repeatedly used, thereby avoiding the waste generated by the repeated use of the connecting member in the prior art and completely eradicating the environmental pollution on site.

While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

Claims

1. The utility model provides a tray, the tray includes the base and sets up the gyro wheel in the base below, the base is rectangular plate-like, its characterized in that, near the edge of base is equipped with base portion of holding, base portion of holding is equipped with the block chamber and holds the chamber, the block chamber with hold the chamber and be close to the edge sets up and spaced apart from each other just the block chamber is for holding the chamber and being closer to the base the edge.

2. The tray of claim 1, wherein the snap cavities have an upward opening, and a dimension of the snap cavities in a direction perpendicular to the edge is smaller than a dimension of the snap cavities in the direction.

3. The tray of claim 1, wherein the base receptacle is provided adjacent at least one pair of opposing edges of the base.

4. The tray of claim 1, wherein the base receiving portion is located on a top surface of the base or a side surface of an edge adjacent to the edge.

5. The tray according to claim 1, further comprising a connecting member, wherein the connecting member comprises a connecting strip, a first engaging portion and a second engaging portion are respectively provided at two ends of the connecting strip, at least a portion of the connecting strip between the first engaging portion and the second engaging portion is flexible along an extending direction of the connecting strip, and the engaging cavity is configured to be capable of engaging with the first engaging portion and pivotally connecting with the first engaging portion as a pivot and to be capable of engaging with the second engaging portion.

6. The connector according to claim 5, wherein the first engaging portion and the second engaging portion are provided with protruding shafts at both ends perpendicular to the extending direction of the connecting strip, respectively.

7. The connector according to claim 6, wherein the two protruding shafts of the second engaging portion are provided with elastic means, respectively, which bias the two protruding shafts toward the outside of the connecting strip.

8. A connection piece according to claim 7, wherein at least one of said two protruding shafts is arranged on an elastic piece extending perpendicular to said connection strip and parallel to the extension direction of the connection strip.

9. A coupling according to claim 8, wherein said two protruding axes are respectively arranged on two resilient tabs extending perpendicularly to said connecting strip and parallel to the extension direction of the connecting strip, said two resilient tabs being respectively located on both sides of said connecting strip.

10. A connector according to claim 9, wherein the resilient tab is provided on an outer side thereof with a connector operating portion which is a flange spaced from the projecting shaft and closer to the centre of the connecting strip relative to the projecting shaft.

11. The connector according to claim 6, wherein the two protruding shafts of the first engaging portion are two ends of a rod-shaped member extending perpendicularly to the extending direction of the connecting bar at the end of the connecting bar.

12. A connection piece according to claim 7, wherein said two elastic pieces are connected to each other at the ends of said connection strip by ribs perpendicular to said connection strip.